i recently built a computer about a month ago and i was having no problems what so ever. then last night i shut down the computer because the light makes it hard to sleep from the led's so i shut it down this morning i get up turn it on. and it comes up with error overclock not working, then i redo the overclock down to normal, the computer then says i dont have windows installed, then i go find windows install usb my computer shuts down and when i try and boot it up i get nothing. i then pull the graphics card out and finally get the asus logo to appear only when i go to bios all i get is a black screen